COLLABORATIVE RESEARCH: Geodynamic Response to Extension in Convergent Orogens

合作研究：汇聚造山带伸展的地球动力学响应

• 批准号: 9909102
• 负责人: Jane Selverstone
• 金额: $ 3.87万
• 依托单位: University of New Mexico
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-07-01 至 2002-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9909102&HistoricalAwards=false
• 关键词: COLLABORATIVE; RESEARCH; Geodynamic; Response; Extension

9909102SelverstoneOrogenic processes at convergent plate boundaries involve surficial processes, possible extensional tectonics and uplift and exhumation of rocks in addition to the overall compressive tectonic setting. How these processes interact and are apportioned in most convergent margins is problematic. The research will investigate a well-developed trellis drainage pattern in the Alps that is thought to be a direct consequence of the extensional mechanism, with syn-convergent extension occurring normal to the convergent direction resulting in broadly folded foot walls and high angle brittle faults presumably created as the foot wall passes through a rolling hinge. Differential erosion exploits the lows in the folds and the high angle faults resulting in the observed trellis pattern. This project is a geomorphic, petrographic and structural study to test the concept of the origin of the trellis drainage pattern, and these data will be incorporated in a tectonic/geomorphic model. Results should help apportion rock exhumation to tectonic extension and fluvial erosion in this and other constructional setting.

在收敛板边界处的9909102SelverstoneOrenogentic过程涉及表面过程，可能的延伸构造以及除了整体压缩构造设置之外，还涉及岩石的隆起和挖掘。 这些过程如何相互作用并在大多数收敛的边缘分配是有问题的。 该研究将研究阿尔卑斯山中一个发达的格子排水模式，被认为是延伸机制的直接结果，同步串联的扩展正常出现到收敛方向正常发生，从而导致宽角脚壁和高角度脆性断层，可能是由于脚壁通过滚动铰链而产生的。 差异侵蚀利用褶皱中的低点，高角度断层导致观察到的格子图案。 该项目是一项地貌，岩石学​​和结构研究，用于测试格子排水模式的起源概念，这些数据将纳入构造/地貌模型中。 结果应有助于将岩石挖掘成构造延伸和河流侵蚀。